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Posted to hdfs-issues@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2015/06/17 05:04:04 UTC
[jira] [Commented] (HDFS-6581) Write to single replica in memory
[ https://issues.apache.org/jira/browse/HDFS-6581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14589228#comment-14589228 ]
Hudson commented on HDFS-6581:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #8032 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/8032/])
HDFS-7164. Feature documentation for HDFS-6581. (Contributed by Arpit Agarwal) (arp: rev 5dbc8c9cb00da1ba55e1c94c4c1e19d34cf1bd5a)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/site/resources/images/LazyPersistWrites.png
* hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/CentralizedCacheManagement.md
* hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/MemoryStorage.md
* hadoop-project/src/site/site.xml
> Write to single replica in memory
> ---------------------------------
>
> Key: HDFS-6581
> URL: https://issues.apache.org/jira/browse/HDFS-6581
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: datanode, hdfs-client, namenode
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Fix For: 2.6.0
>
> Attachments: HDFS-6581.merge.01.patch, HDFS-6581.merge.02.patch, HDFS-6581.merge.03.patch, HDFS-6581.merge.04.patch, HDFS-6581.merge.05.patch, HDFS-6581.merge.06.patch, HDFS-6581.merge.07.patch, HDFS-6581.merge.08.patch, HDFS-6581.merge.09.patch, HDFS-6581.merge.10.patch, HDFS-6581.merge.11.patch, HDFS-6581.merge.12.patch, HDFS-6581.merge.14.patch, HDFS-6581.merge.15.patch, HDFSWriteableReplicasInMemory.pdf, Test-Plan-for-HDFS-6581-Memory-Storage.pdf, Test-Plan-for-HDFS-6581-Memory-Storage.pdf
>
>
> Per discussion with the community on HDFS-5851, we will implement writing to a single replica in DN memory via DataTransferProtocol.
> This avoids some of the issues with short-circuit writes, which we can revisit at a later time.
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